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Message: [QUOTE="rmrider45, post: 1402555, member: 96571"] just did a compression test on my 2003 rm 125 and for being the same top end in the bike for 2 years the bike has 180 psi:) kicked it with the throttle wide open and clutch pulled in and kicked it till the gauge stoped. i have one ? when i put a new spark plug in the bike it gets real tight but after riding it for a while the spark plug comes loose?it like backs out :( is it because i run regular gas in it (87)? [/QUOTE]